Home / 143,781.61-198,419.40-83,388.06

Finding the Fourth Proportional to 143,781.61, 198,419.40 and 83,388.06

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Solution

The fourth proportional to 143,781.61, 198,419.40 and 83,388.06 is: 115,075.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,781.61 : 198,419.40 = 83,388.06 : x
  2. Step 2: Convert to fraction form
    143,781.61/198,419.40 = 83,388.06/x
  3. Step 3: Cross multiply
    143,781.61x = 198,419.40 × 83,388.06
  4. Step 4: Simplify right side
    143,781.61x = 16,545,808,401.00
  5. Step 5: Solve for x
    x = 16,545,808,401.00/143,781.61
  6. Step 6: Final answer
    x = 115,075.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.